SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff199623fd3e2f300747096489137b6d7f34a6eb9731dd49fd36aa012565efc8' 
  AND token = 'Q6nxWBWOZWmXzt4C5PUJ++PN/wdgXb2LxtiCcw2mGwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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