Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36ba21c4f24f15eb44464163f7129e2800a521c4790b174af7bedd8e9906f882' 
  AND token = '6jy8TVw9Xtge6L97GvB4FV1rfiiV5U4pR505yucK6C4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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