Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c19261167816d1b7fbf7806b90f46378378f1b37e9f45e80472c7709ab6a0a9' 
  AND token = 'UkuhfTW9fd8H1ubE/POVNQ2ixvb+2oqA3mB2MafdXdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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