Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eb33ddb2aa94cd29f64f9dc8cbe45fe00b0e2a1e973f236457c851ff6518653' 
  AND token = 'MHodj93w7J4zTyb5wNu0UldILQN0SiMKkwzjJCpI12s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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