Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb2dfb1c905f90127156b1e40b4078a351a54a65f640230a462f7644cce03c6d' 
  AND token = 'Eq19xW8uoKlGr4GmNPZ6ZzkhKl2kgBdS3R94NHSYu2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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