Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7bfb7680cb0bd930f60502db0692fc24663ae44b3c0e407e57756e9cd97aa0c1' 
  AND token = 'Uc8DMvvTiYBYFu2tWFj3UP8+T9KYWvbgvUdMCy6WY9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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