Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19474d53afac001788872c723acd7105130a2bb108c70a24da57ff9e9b16e88f' 
  AND token = 'n2bkofbKToyF5bk7ukLey1tDUYqFBUx2PgCgrYvPgis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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