SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '559371d188f3adb23a9f8747d5a7c47d0e6c47042341feadd0c62ab24f01d050' 
  AND token = 'hUytSwNYvJh17jSOIqC/9XQYFVb19Hr3WwmVpgXAlTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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