Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a19c6d969e84a743f637050a3e4401c65a2fbcfec36cc107c58f2eddc5d0333c' 
  AND token = '87xGnafx3ySxiNapShEnldZFK24f9QAZDXE06PJY+4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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