Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ea699aded8a5badfd190e671107f02a6d7880ddc3d0813a33ebf29d7f2b2698' 
  AND token = 'nr9fsLY3Q1HAZXiBvVbN6D9kZesobnlRRBdqFcPD5mo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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