Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd19c3268d78ab225819c73013e398c5c58893c89c7a0e78aab7c5fa8e1ef52f5' 
  AND token = 'DtFkJiXST8MAR0L1nZGL17tOqR7Q8rr+uVLrNgL7YME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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