Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c90e68408e3d1881510c105cd679dcd66e04b541e0762d6a8ed8d5964b29ef4' 
  AND token = 'ImUAa1Z2ZTafKWaxX7VI5I80aeNc4MjI5TJp3tF+etU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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