Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44715b5b162189ee201ed0e5bd0052bc362b9635968fa4af71ae844d4a7adfec' 
  AND token = 'oczrPE0s9Xzlgrrg9SIKdPrQ1JGVEoKbnglLRRLsqvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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