Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c451c3a99fb0200ebfab7e56693b6885343847e96b27d20235e81f404898cc88' 
  AND token = 'xdzLenu1koX2CJxicDJh6Q1s7wHc8q2fKlGSdU4kQq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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