Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1baa041958ca3fc45c3759be19f6b9c344a94906bcf5fb9c52aeec0f2ba9cf13' 
  AND token = '8PXPW0TgmsrEXwsanhrFHbGphHnydq6mNWfYQetyJkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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