SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bb0f0ed092a8e19b031e6a8a159fd2c280ac9f386a40709db28dca58ab33061' 
  AND token = '683EKdrbfGjVuM+Uqzgrlic40PVXnpY9NGDVh/s2YZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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