Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e952d6fa3cfb3387923c98f01e57dce5a2d2b600848497f1a36fbdf970d872a2' 
  AND token = 'NJZ9ZbxDbtTaDWmVtjf4F93SiVT7moZwIlqYv0NBTMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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