Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d1127a17256aede3284def0fb3d1e77466a1e8f35f58b3bf24a4dde15f20bfa' 
  AND token = 'rgDRcDbgyn4wgx3JWFXzKcWB7JdiWstYAiUBycexe5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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