Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '398ec99264ef917aac49c3adda9b968db60d2ca0cf2fc01b53e87588194d2803' 
  AND token = 't3yGua3d23KN/9WVt9KX4slidxvR6dHg/0xUqoEsCBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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