Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40954b6340b1e6599a076106da9bd018ddf634c05384d6a2cdbe64f14477ea8c' 
  AND token = 'UOoUfRFn+BJxfL3U3VhywWK/EetbowQ/68SnVOOcbGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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