Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68acc2f757c14a0ed374fde0066d6a4740c65cba3d0b3bbe5cf6a2ad2ac014b8' 
  AND token = '8v96BxssowdzoFqJH/zrx3iQ3yRef+AP5Pm+FryuZLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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