Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '466a1998bc28c7e2e8428affed0a89a6fae0c6b8d1f26e218bc2c87e2198d4c8' 
  AND token = '7QgCtZ1+HXgAh1qBVYecsyT7JwpMdz045IA2mW/2hTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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