Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '882d1b6df7b0fe1a32c5652132305226a9e5a28f1e1d876dca9a2e46f978ad00' 
  AND token = 'wPqGatEQvg3Y9NbrQoY8OCbV2Ze9KagFEOHhkOGr1uM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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