Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b795a7c9bb8d5579a0ac9080d3c1e3fb2b6b9d9b8eef97b7e1a8b60ce191915' 
  AND token = '7pYtmEq4UPGbA5vRHumxvg645QaswgMfqGCd9jw7dP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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