Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e10979d70869bf3c9aeeff6208ddebbea1b08b54f443d647bb68f888eec27131' 
  AND token = 'sM8KECX8lIDCfjRSMAzByDqGLB8sKThS4M2q2uBEXN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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