SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b90c2b5f171ec2ed4d9257f5936700b63f9702530952dcfe44aeb2dbc78b49a' 
  AND token = 'zUoXTNX6J/QqIAJzuuef2B5bdVis4A6npwqUhy8K+Tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}