Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06e13ea53999c017d0ae083e56e10c1a4fea17531f30d17a9a4fd9b3f319369c' 
  AND token = 'wauDSaM2Mt9kQDLR8t6k+9Vn9DxM6QW4TWBK1nlFvfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}