Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e782119cbc5a84a1aebf2c1b736c27625ec9a52a695ab2438c403c02be320839' 
  AND token = 'lbXu/SR3gEwgHHpTpKetW7ktHORxg66wUCNVjjHxsUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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