SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f7599b7d3dff88c69bbc4d8d9322bab61f0e9e06d88673985b1c7b7c92a00bd' 
  AND token = 'YjcrCEBR/GibJjGyFmjM+k6BWZdOYgNqwvfWX/wfyV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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