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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8d27c6d4c5301fdebc5fd07b90d9a1572e99daec3b930a391f64ca5ca1d8c349' 
  AND token = 'X2fSFQjbwX2RHWNHy8vV4tr6wnEJrJzvUOo9yCnX62A=' 
  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"
    }
  }
}