Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00b31d0b1dd147e7d9df5317ace02a8903619969d3318b87f30b16cbef7b6777' 
  AND token = '0OcqdnedfTygCwqO648z09aNmrboqeMBAvJQoCyWQLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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