SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17beda6f320c3fbf221662434513e8e567472a43c372d57ec1eaad848bbc32d9' 
  AND token = '/67Rg7W9w9j4ZG+tKC9fQdJBCHzA0juNbOcGP8unp2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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