Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35a7054ecd89979355e11b36c0b85221ef35a7a155ffbe564b8287124666124b' 
  AND token = 'kdfLSEqaYW51rL+t3WsuMeOfJEzYSYdRmZR2dKCkNcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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