Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd383f848e1890214e05cd276237c3415c25001f927e03f11fcd8d5fd95b0affa' 
  AND token = 'JWXhi6uvCvbshdTvC5tSZRPyncpGV84FjBLWGsN0Wss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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