Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad95eed137d5523278a04e7109037eb214dc0f4bda699e3fbbcdb355ac3462c5' 
  AND token = 'blwxOFtzRRuIbTaHZLVyIEEKM8j7qdHcSdkaLvoujw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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