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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '561e10946341d905f776f7afd4ea62a7af0dc1920a4ce9467b6ca2bef32a0bd9' 
  AND token = 'vARkpVUpATAEKhBeE2eEgJ3xAlUL/RzXZ2aFH382S7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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