Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '328856e8b92461feaa6651829cf7ee54190e7c9889955187b8a6f3b3ab2b223c' 
  AND token = 'TOOcmpIpc/71eA8GVbCW2iF4nrKWtzHnt0LGL9DMS3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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