Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf20c794a98bcc9f3c9c953fd34970a6403705624a95efda28d8ce80d6c8a0e' 
  AND token = '2MFpg4+0cHdPw3CHl8uUMGqIVAxWjGN1Ut9N2HXPmPU=' 
  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"
    }
  }
}