Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '703247d1b12833bae498a5949be94692f40dcb15d55a283e9b1d75717999f495' 
  AND token = 'bmIw7ZlliIrUOdI0KjwvzNFzHuJoQI+yXe++TIR+yo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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