SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dfbe1f8d915551044290696e73d0a628bb8f352d033ec3dbdd77aaf9aa7d0b6' 
  AND token = 'G9aprrQtxEwuVx7VvKw2TeIbZX4CB/VQJ2F5y3qRRwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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