Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6af28a5289faee9219036a912cbf2a7f7d3121b94f99374528a3d7dca831bf80' 
  AND token = 'WJo45lFmShPhD+pQh5NtAza8xdaCVCaV/f4FmSNb5tU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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