SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de479c0224df8b99ab7b26684aa0973dd2ad8a23f1a6070602ea980ff8d5025' 
  AND token = 'jLvhp1HY8jbnqvFQcesmmlQ49ns73mUBQVFJ/TH/tYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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