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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fe8d830b386a1449205cf3220ef8a94b77a626c15af258e9e39d5e0d382a40a1' 
  AND token = '4EUPfSI3y0VIaJ+g095jvEx11jAnCSvGmxl3C/cToI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}