Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '49eb20edd1e0db45045c36edced6d96966df18e9a280fe89f1ad08f2a5fc074e' 
  AND token = '7zOCJ2F69opn6YHHy5sY3VYo3IqJAR8Nwhf6J1qu+fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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