Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d0fa49a791dbdf64544f5ae8bc833e5b366d34c0ee7402a3aa6138e7b27cdcc' 
  AND token = '2TrTNwpLLzLCDTHZ/wT2yL+0Vo0Wka+9XACzGY6mJ9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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