Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0b40624c4971e2f39ad16addcb6a699a317f666f8a109993bc9ce9c49dc0b93' 
  AND token = 'q0XVdE5Yd/2155EYx5sBJMUTuJEYRrFvH3obRNKQhDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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