Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13b8915dfee8a566927b21b9d15c66130c06a2a74c7154307510776960ef558a' 
  AND token = 'l+lKmOI9NRVymulQPlV3cqeXGZttjbhx7Zn2n0V81FU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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