Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e64e6572a4ba1690d4e4fe7c4d38a02ef51c7badeec83499b6c6bb60364e547' 
  AND token = 'HZ+26v4+AYDqf7Jd3I26d+EtVl7Pg5ofPl+WMhUmjKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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