Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c5801baa020cbb32de1b9e631a42791b2d693bf2ec1bde3da5c0b33a01c3cde' 
  AND token = 'ZzmCwaRUG8q9pEaUzv55hM47heLnX0hNaRbHzvPQEH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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