Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6108f724d0610d7d245438545768acc8aeb626bf3690aae0618ffae8fb58383' 
  AND token = 'mkS7OyFtXVDfqPfWVpTsNVlMIY320mIDyACgRIh2W+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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