Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dd34b61484269219d0119a3ddfa536d6fa4d8ca82f55bf49976b8497184a176' 
  AND token = '1owhOt6k5rthdS6wnZ7nEzNo1wZU36DDoMf4YnYzMM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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