Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a84c9544370abaa321a3fea9c495cb0d5d6bf30979fc7107af083441db56d565' 
  AND token = 'hBuNAsIsNbiOE1YDNd87XQnaECXl/W6xlkSgFGcwdDA=' 
  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"
    }
  }
}