Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '579c2c3fefbc795d252bd302dcff812d43a8547f30e4fbda9b96f764693e0cbd' 
  AND token = 'OG+QDUTVJjGlklSerTwls3QcfmACJsCZI4Gl47Ck1sQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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