Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8e73d7677356b8456076664d1a428a49ff745447250be46b2c72b8645077461' 
  AND token = 'jCzj+IpjhPV4dPSrZktGZZvSj6RTaWTbDx66Bvx0Mbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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