Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc08a9af497d8f39b9e182622549472dccd4f9cc977680f6ad37b1d952cec847' 
  AND token = 'dYagzO9IGX59RtpOaZDu6xA+2fnnAkdviHOWhO67dZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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