Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d6853098adcf370565974a37d76ada8785131a17a94485eb07aaeae3a8303c0' 
  AND token = 'dWJSA1V9b3xJYbXhC2PRJmHYPrNsskCJMprDs3JZNsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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