Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f401d9bd34bbbbf2dccb27a6c91c4e0e6deb2275f288e79285fbc598a94c2252' 
  AND token = 'Q0LYCZ39LDdRC2upwF+Y8fhCne8p5gznI26Qakf9ino=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}