SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '663f44ad54bb87f929379e32149f5933f19fac805292ce78d5d5275232427672' 
  AND token = 'TCscnk1L/Bwk8jqc73yu4TvR9/NHczI4hJWupg/vQvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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