Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8044219e6e9ccf7809fb11c03deef33ca5a03486c5b9bd4ecb90d2723cb3189' 
  AND token = 'xdaYX0Vvb9wlTwcKxg2C64D0tDM+GbHEqCUkOlj9560=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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