Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89403c46935266c5bfff107e9aa8b4cfb8d0fe2186a2e79a185cbfe1e0688cb5' 
  AND token = 'm1Okrrkvq8o7Rx/vqgByJIMBPVBBgC6u6NiplougAgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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