Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2902bbb39cfce2cab7b38d68b7751222941592e86ed718c289a36772e328ee73' 
  AND token = '96sAWXpKiwryh3D3vndfT0bWAhYGdUwHl9t7JVWA5XE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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