Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4439ec3d1f5fa5431d01ea226690ab143551af1097e30da3157969442c6dfa7' 
  AND token = 'sKrsVHi+7AkcvcFMgU2GPTRSYxcdD6rnosOA7r8d95Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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