Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e982be7622ee9960bb1cfbc91ded26835769c4f77a96b39179c3d2ac944f21bd' 
  AND token = 'wQs0NUxOCo2qM1lrNGsc15oEsW6y3yP8i/HxRE+t+zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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