Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6d0c4d37214bb5aed95ca4442399496c4b80bded0e962d7976c89caf0eb07d3' 
  AND token = 'TIgnhNs81iSOeQzF05sY1U2KUL4WRv58fhNlupkh4BE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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