Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c778a25d413e64b595a06bae899f0049913d5d1d5099331f3c5fb1c81c985eaa' 
  AND token = '/xllQ1mYGVIDFx+mQriC1bgj61Q5XJZ8szsPOQTD0xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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