Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04b53df19a39a9b0f7a7dfafe1ab8917da06434a3b5d469a6ef07a1a53ae6fbc' 
  AND token = 'qAJtDJiGMJzoAqMiWy4yzqXDnrsOTBmMHIeZxun2k74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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