Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96e0894393ee12a200d0fe5353f3482d3cfb3ffd0d6a4342e223fe8c86d79028' 
  AND token = 'dULcS8C3pBIoA9gf4tL+XK9iMfGJKfuiWpQdMS3Isqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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