Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd662ec6d4a1e777c591675ceabcaf37c29a03b822276561f12bde17108da5ec' 
  AND token = '5FrBD5ZrqBmdeguX3v1h6KYJybiImsDIOllL8ctQ46E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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