Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9284fe50162966bb6fdee04e8852bae61bf87127d2046c90e100f571e001e61' 
  AND token = 'ujlozQaLqCXASBqLdEvpUoz5lsIMrLAuZWuA66nfqh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00079

JSON explain

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