Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '447746bd18123a5230ecdfb3c920ccdbe4e840ea6a00677c206e78cacde003e1' 
  AND token = '7FNMSCmPm6Zj2RggiKEXLQUFXxcRPykzv4nQ+7oknMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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